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2. Actions of concrete admixtures
2.1 Improved processing conditions – Workability
Originally, the first additives were probably used to improve the mixing, placement and finishing of the plastic mixture. This last consideration is important for the architect, as it reduces or eliminates :
penetrant testing ;
SEGREGATION;
the formation of pebble nests;
unsightly surface defects that may result from the mixture's lack of plasticity.
Most of the admixtures used, whether air-entraining agents, set retarders or water reducers, improve workability. Although this improvement is considered a side effect, it is often the main reason for using admixtures....
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Actions of concrete admixtures
Classification of adjuvants by efficacy
Bibliography
Standards and norms
- Produits chimiques liquides à usage industriel. Détermination de la masse volumique à 20 °C - ISO 758:1976 - Novembre 1976
- Agents de surface. Détermination du pH des solutions aqueuses. Méthode potentiométrique - ISO 4316:1977 - Août 1977
- Plastics – Vinyl chloride homopolymers and copolymers – Chlorine dosing - NF EN ISO 1158 - Juillet 1998
- Utilisation du chlorure de calcium et des adjuvants contenant...
Directory
Organizations – Federations – Associations (non-exhaustive list)
SYNAD (Additives Producers' Association)
CERIB (Research center for the concrete industry)
CIMbéton (information...
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